I recommend you take the GMAT test again. The reason is that, let's consider Chicago Booth. The average GMAT score is 720, with an 80% range of 660-760. If you applied to the school, your score would be in the bottom 10th percentile. This doesn't mean you wouldn't be accepted, but it is not a preferable position to be in.
Although you are applying to the part-time program (which has a lower average GMAT score), and your work experience will be considered more than your GMAT score and undergraduate record, you will still improve your chances of acceptance with an improved GMAT score.
Your GMAT score is self-reported on your application, so admissions teams will only focus on your highest score. We also have free GMAT advice here: http://www.stacyblackman.com/tag/gmat/
We also have several case studies of candidates who were accepted into top programs with low GMAT scores. Here is one case study:http://www.stacyblackman.com/2011/03/09 ... -the-gmat/
Hope this was of help.
Conrad and the Stacy Blackman
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